Software Engineer - Node.JS

Location: Kolkata, West Bengal

Experience: 3 Years

Tech Stack: Node.js, Typescript, JavaScript, GraphQL, PostgreSQL, MongoDB, Redis, Neo4j,

Elasticsearch etc.

Domain: Fintech / Finance Distributed Systems

About the Role

We are looking for a highly skilled Senior Backend Engineer who can architect, build, andscale robust backend systems powering high-growth consumer and fintech applications. This role involves solving complex engineering challenges, optimising database performance,improving system reliability, building secure infrastructures, and contributing to data-driven product decisions.You will collaborate closely with cross-functional teams such as product, design, and DevOps, and will play a key role in shaping the backend architecture and engineering roadmap.

Key Responsibilities

Backend Architecture & Development

● Design, develop, and maintain scalable backend services using Node.js, TypeScript,

Express, Apollo GraphQL, SQL and NoSQL databases.

● Build and optimize REST & GraphQL APIs with high performance, low latency, and

strong reliability.

● Architect microservices and modular backend components for high availability and

horizontal scalability.

Database Engineering & Optimization

● Lead end-to-end database architecture across PostgreSQL, MongoDB and Redis.

● Perform large-scale schema migrations, indexing strategies, performance tuning, query

optimisation, and replication-based setups.

● Implement caching layers using Redis, including intelligent caching strategies.

Infrastructure, DevOps & Security

● Manage production-ready infrastructure on AWS (EC2, RDS, S3, CloudFront).

● Implement CI/CD pipelines on Azure DevOps

● Ensure security best practices and compliance with fintech-grade data protection.

Performance & Reliability

● Improve codebase quality, stability, and resilience through testing frameworks and

automation.

● Diagnose and solve production issues, memory leaks, CPU spikes, and scaling

bottlenecks.

● Cross-functional Collaboration

● Work with product managers and designers to define technical requirements and

improve user experience.

● Mentor junior engineers and contribute to code reviews, architecture discussions, and

engineering best practices.

Key Achievements Expected from This Role

● Successfully optimize backend systems resulting in measurable gains in reliability,

performance, and user engagement.

● Lead large-scale database architecture refactoring projects.

● Deliver secure, compliant fintech-ready solutions.

● Increase product growth and engagement through analytics-driven engineering.

Required Skills

● Languages: JavaScript, TypeScript

● Frameworks & Runtime: Node.js, Express

● APIs: GraphQL, REST

● Databases: PostgreSQL, MongoDB, Redis

● Cloud & DevOps: AWS (EC2, RDS, S3), Nginx, PM2

● Caching & Performance: Redis, Indexing strategies, Query tuning

● Security: API security, access control

● Tools: Azure DevOps, CI/CD, GIT Version control

Preferred Skills

● Experience in fintech, payments, or subscription systems

● Familiarity with TypeORM and repository patterns

Soft Skills

● Strong ownership and accountability

● Ability to break down complex problems

● Excellent communication and documentation skills

● Leadership in mentoring, design discussions, and technical strategy

Job Types: Full-time, Permanent

Pay: ₹500,000.00 - ₹1,200,000.00 per year

Benefits:

• Health insurance
• Provident Fund

Work Location: In person